| 1 | /* Filename-seen cache for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 1986-2019 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "filename-seen-cache.h" |
| 22 | #include "filenames.h" |
| 23 | |
| 24 | /* Initial size of the table. It automagically grows from here. */ |
| 25 | #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100 |
| 26 | |
| 27 | /* filename_seen_cache constructor. */ |
| 28 | |
| 29 | filename_seen_cache::filename_seen_cache () |
| 30 | { |
| 31 | m_tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE, |
| 32 | filename_hash, filename_eq, |
| 33 | NULL, xcalloc, xfree); |
| 34 | } |
| 35 | |
| 36 | /* See filename-seen-cache.h. */ |
| 37 | |
| 38 | void |
| 39 | filename_seen_cache::clear () |
| 40 | { |
| 41 | htab_empty (m_tab); |
| 42 | } |
| 43 | |
| 44 | /* See filename-seen-cache.h. */ |
| 45 | |
| 46 | filename_seen_cache::~filename_seen_cache () |
| 47 | { |
| 48 | htab_delete (m_tab); |
| 49 | } |
| 50 | |
| 51 | /* See filename-seen-cache.h. */ |
| 52 | |
| 53 | bool |
| 54 | filename_seen_cache::seen (const char *file) |
| 55 | { |
| 56 | void **slot; |
| 57 | |
| 58 | /* Is FILE in tab? */ |
| 59 | slot = htab_find_slot (m_tab, file, INSERT); |
| 60 | if (*slot != NULL) |
| 61 | return true; |
| 62 | |
| 63 | /* No; add it to tab. */ |
| 64 | *slot = (char *) file; |
| 65 | return false; |
| 66 | } |